Sieve-holder.



No. 842,036. PATENTED JAN. 22,. 1907.

E. J VRAALSTAD. SIEVE HOLDER.

APPLICATION IILED APB.11,19Q6.

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No. 842,036. PATENTED JAN. 22 1907.

E. J. .VRAALSTAD. SIEVE HOLDER. APPLIUATION FILED APR.11, 1906.

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EDWARD J. VRAALSTAD, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE- HALF TOBUFFALO PITTS COMPANY, OF BUFFALO, NEW YORK, A (JOR- PORATION OF NEWYORK.

SIEVE-HOLDER.

Patented Jan. 22, 1907.

Application filed April llI 1906- Serial No. 311,168.

To all whom it may concern:

Be it known that I, EDWARD J. VRAAL- STAD, of Buffalo, in the county ofErie and State of New York, have invented certain new and usefulImprovements in Sieve- Holders and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

The object of this invention is to provide improved, simple, andhighly-efficient means for securing the sieves or screens within athreshing-machine box or shoe, which latter, as is well known in the artof threshing machinery, has a vibratory or shaking motion. It is alsowell known that it is frequently necessary to change or replace thesieves and one of the objects of my invention is to enable this to bedone with the least possible difficulty and while providing fordifferences in the lengths of the sieves avoid the use of springs orother parts liable to readilyget out of order or be deranged.

A further object is to provide simple and efficient means for lookingthe tail-rack in place.

The invention will be hereinafter fully set forth, and particularlypointed out in the claims.

In the accompanying drawings, Figure l is a longitudinal sectional view.Fig. 2 is an enlarged horizontal sectional view on line 2 2, Fig. 3.Fig. 3 is a View of the lock and. sieveholding plate. Fig. 4 is anenlarged fragmentary View of the tail-rack support. Fig. 5 shows thelock for the other end of the tailrack. Fig. 6 is a plan view thereof,partly in section. Fig. 7 shows the parts of Fig. 4 detached. Fig. 8 isa vertical sectional view on line 8 8, Fig. 6. Figs. 9 and 10 aredetails.

Referring to the drawings, 1 designates the ordinary sieve-holding shoeof a threshingmachine; 2, the top sieve 3, the lower sieve, and 4 aplate having seat-flanges 5 for supporting the sieves at one end.

7 designates a second plate for-supporting the sieves at their otherends. This plate is formed on its flat face with a lug 8, which extendsinto a slotted plate 9, secured over a slot in the side of the shoe,such lug guiding the plate and permitting it to turn axially to conformto the lengths of the screens. In this plate is formed an opening whichreceives and accommodates a boss 10 on the end of alongitudinally-movable lock-bar 12. It is this boss which forms theaxial pivot for plate 7, the range of movement of such plate beinglimited by stop-lugs 13 thereof on opposite sides of the lock-bar. Thelatter is retained in place against the side of the shoe by a keeper 14.The rear half of this lock-bar occupies a plane parallel to the forwardhalf, being bent laterally at about its center and thence on a straightline. This latter portion is equipped with a series of rack-teeth 15.

1 6 designates the lock for retaining thelockbar in position and foreffecting its longitudinal movement in binding and releasing the sieves.This lock comprehends a circu lar disk 17, having on one face a hub 18,which projects through a hollow boss 19 of a flat plate 20, the latterbeing secured to the inner face of the side of the shoe, while the bossfits in a corresponding opening in such side. The disk 17 has a spiralflange or thread 21 for engaging the rack-teeth of the lock-bar, so thatby turning such disk the bar will be moved longitudinally andtransversely of the axis of such disk. The bar and the threaded disk areretained in place by a cap-plate 22, having diametrically 0ppositeopenings to permit of the passage of the lock-bar. Preferably thecap-plate is held in position by screws 23, which secure the plate 20 tothe shoe, such screws being passedthrough coincident openings in the twoplates. key 24 or other device into the opening of hub 18 thelocking-disk 17 may be turned axially, and through its threadedengagement with the lock-bar the latter may be shifted to force plate 7against or to release it from the ends of the sieves. In forcing theplate 7 home it will readily conform to the lengths of the sieves byreason of its pivotal connection to the lock-bar.

25 designates the tail rack, which is equipped at one end with ashouldered lug 26-, which fits in either of two seats 27 of plate 7.

By inserting a square-ended A flange 28 overhangs a portion of suchseat, so as to retain the shoulder of the lug in place. At its other endthe tail-rack carries an inverted-U-shape plate 29, secured in place bynutted bolts 30, passed through a flange thereof. The parallel portionsof this U -shape plate have inwardly-extended flanges 31, formed neartheir upper ends with grooves This U-shape plate receives the inwardly-bent T-head 33 of a plate 3 1, secured to the side of the shoe bya nutted bolt 35, which bolt also retains a plate-spring 36, having aslot through which the T-head projects. Said head has two nibs orprojections 37 facing the spring-plate, so that when the U-shape plateis forced down over the T-head such nibs will enter the grooves 32,being retained by the spring-plate, which is placed under tension by thepositioning of the U-plate. From what has been said it will be seen thatthe tail-rack and the sieves may be readily removed or secured inposition, and the parts are so constructed that even the constant usethereof will not effect their efficiency. The one plate serves as asupport for both the sieves and tail-rack, and although it is positivelylocked in position it may readily accommodate itself to inequalities inthe lengths of the sieves.

Although I have only shown and described the means for retaining therack and sieves in position at one side of a shoe,it will be understoodthat the parts are duplicated on the opposite side.

I claim as my invention 1. A sieve holding device comprising asupporting-plate for a plurality of sieves, a longitudinally-movablelock-bar, and means connecting said bar to said plate, forming a pivotfor the latter.

2. A sieve-holding device comprising a supporting-plate for a pluralityof sieves, said plate having an opening therein, and alongitudinally-movable lock-bar having a boss fitting in said openingand forming a pivot for said plate.

3; A sieve-holding device comprising a supporting-plate for a pluralityof sieves, said plate having an opening therein, and a guidelug, aslotted plate for said guide-lug, and a longitudinally-movable lock-barhaving a boss fitted in said opening.

4.- The combination with the sieve-holding plate for engaging aplurality of sieves, of the lock-bar engaging with said plate, and a1'0- tary lock for moving and holding said bar in different positions.

5. The combination with the sieve-holding plate, of thelongitudinally-movable lock-bar engaging therewith, and a lock forengaging and moving said bar, said lock being rotatable at right anglesto the plane of movement of the bar.

6. The combination with a plurality of sieves, and a holdingplate forengaging therewith, of the lock-bar with one end of which said plate hasa pivotal connection, said bar having a series of rack-teeth, a rotarylock having a disk carrying a spiral thread or flange engaging saidteeth, and detachable means for engaging and turning said disk.

7. The combination with the sieve-holding plate, of the lock-barengaging therewith, and having a series of rack-teeth, a lock having adisk carrying a spiral thread or flange for engaging said teeth, saiddisk having a hub projecting therefrom by which it may be axiallyrotated, and means detachably engaging said hub for effecting suchrotation.

8. The combination with the shoe having an opening in its side, of thesieve-holding plate, the longitudinally-movable bar engaging said plateand having a series of rackteeth, and a lock comprising a disk having aspiral thread for engaging with said teeth and a hub extending throughsaid opening of the shoe, and a cap-plate for retaining the bar and diskin place.

9. The combination with the sieve-holding plate, and thelongitudinally-movable bar engaging therewith having a series ofrackteeth, of the lock comprising a plate having a hollow boss, a diskhaving a hub fitted in said boss and also having a spiral thread orflange for engaging said rack-teeth, a cap-plate having oppositeopenings to accommodate said bar, and means for securing said cap-plate,said means also retaining the lock in position.

10. The combination with the shoe having an opening in its side, and aslotted plate fitted in said opening, of the sieve-holding plate havinga lug fitted in said slotted plate, the longitudinally movable lockbarengaging with said sieve-holding plate, and means for moving andretaining said lock-bar in different positions.

11. The combination with the sieve-hold ing plate having a seat therein,of the tailrack having at one end a lug fitted in said seat, and at itsother end having a slotted plate, a retaining-plate having a T-head withwhich said slotted plate is designed to engage,

and a spring for holding said head and said latter plate together.

12. The combination with the shoe and the sieve-holding plate having aseat and a flange overhanging such seat, of a tail-rack having at oneend a shouldered lug fitting in said seat, and at its other end aUfshape plate, a plate secured to the shoe having a T- head forinterlocking with said U-shape plate, and a spring-plate for holding thelatter in engagement with said T-head.

13. The combination with the shoe and the sieve-holding plate having aseat and a flange overhanging such seat, of a tail-rack having at oneend a shouldered lug fitting in In testimony whereof I have signed thissaid seat, and at its other end a U-shape plate specification in thepresence of tWo subscrib- 10 formed with oppositely-extended flangeshaving Witnesses.

ing 'rooves near their upper ends, a plate haviig a T-head formed Withnibs for enter- EDWARD VRAALSTAD' ing said groove, and a spring-platefor holding said U-shape plate in engagement With said T-head.

Witnesses:

JOHN B. OLMsTED, EDWARD F. HIOKMAN.

